c2c19e5ae4
**Ready for review. Examples migration progress: 100%.** # Objective - Implement https://github.com/bevyengine/bevy/discussions/15014 ## Solution This implements [cart's proposal](https://github.com/bevyengine/bevy/discussions/15014#discussioncomment-10574459) faithfully except for one change. I separated `TextSpan` from `TextSpan2d` because `TextSpan` needs to require the `GhostNode` component, which is a `bevy_ui` component only usable by UI. Extra changes: - Added `EntityCommands::commands_mut` that returns a mutable reference. This is a blocker for extension methods that return something other than `self`. Note that `sickle_ui`'s `UiBuilder::commands` returns a mutable reference for this reason. ## Testing - [x] Text examples all work. --- ## Showcase TODO: showcase-worthy ## Migration Guide TODO: very breaking ### Accessing text spans by index Text sections are now text sections on different entities in a hierarchy, Use the new `TextReader` and `TextWriter` system parameters to access spans by index. Before: ```rust fn refresh_text(mut query: Query<&mut Text, With<TimeText>>, time: Res<Time>) { let text = query.single_mut(); text.sections[1].value = format_time(time.elapsed()); } ``` After: ```rust fn refresh_text( query: Query<Entity, With<TimeText>>, mut writer: UiTextWriter, time: Res<Time> ) { let entity = query.single(); *writer.text(entity, 1) = format_time(time.elapsed()); } ``` ### Iterating text spans Text spans are now entities in a hierarchy, so the new `UiTextReader` and `UiTextWriter` system parameters provide ways to iterate that hierarchy. The `UiTextReader::iter` method will give you a normal iterator over spans, and `UiTextWriter::for_each` lets you visit each of the spans. --------- Co-authored-by: ickshonpe <david.curthoys@googlemail.com> Co-authored-by: Carter Anderson <mcanders1@gmail.com>
86 lines
2.6 KiB
Rust
86 lines
2.6 KiB
Rust
//! Showcase how to use and configure FPS overlay.
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use bevy::{
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dev_tools::fps_overlay::{FpsOverlayConfig, FpsOverlayPlugin},
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prelude::*,
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text::FontSmoothing,
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};
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struct OverlayColor;
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impl OverlayColor {
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const RED: Color = Color::srgb(1.0, 0.0, 0.0);
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const GREEN: Color = Color::srgb(0.0, 1.0, 0.0);
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}
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fn main() {
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App::new()
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.add_plugins((
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DefaultPlugins,
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FpsOverlayPlugin {
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config: FpsOverlayConfig {
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text_config: TextStyle {
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// Here we define size of our overlay
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font_size: 42.0,
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// We can also change color of the overlay
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color: OverlayColor::GREEN,
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// If we want, we can use a custom font
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font: default(),
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// We could also disable font smoothing,
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font_smoothing: FontSmoothing::default(),
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},
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enabled: true,
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},
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},
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))
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.add_systems(Startup, setup)
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.add_systems(Update, customize_config)
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.run();
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}
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fn setup(mut commands: Commands) {
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// We need to spawn a camera (2d or 3d) to see the overlay
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commands.spawn(Camera2d);
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// Instruction text
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commands
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.spawn(NodeBundle {
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style: Style {
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width: Val::Percent(100.0),
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height: Val::Percent(100.0),
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align_items: AlignItems::Center,
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justify_content: JustifyContent::Center,
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..default()
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},
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..default()
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})
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.with_children(|c| {
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c.spawn(Text::new(concat!(
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"Press 1 to toggle the overlay color.\n",
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"Press 2 to decrease the overlay size.\n",
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"Press 3 to increase the overlay size.\n",
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"Press 4 to toggle the overlay visibility."
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)));
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});
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}
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fn customize_config(input: Res<ButtonInput<KeyCode>>, mut overlay: ResMut<FpsOverlayConfig>) {
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if input.just_pressed(KeyCode::Digit1) {
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// Changing resource will affect overlay
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if overlay.text_config.color == OverlayColor::GREEN {
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overlay.text_config.color = OverlayColor::RED;
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} else {
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overlay.text_config.color = OverlayColor::GREEN;
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}
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}
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if input.just_pressed(KeyCode::Digit2) {
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overlay.text_config.font_size -= 2.0;
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}
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if input.just_pressed(KeyCode::Digit3) {
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overlay.text_config.font_size += 2.0;
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}
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if input.just_pressed(KeyCode::Digit4) {
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overlay.enabled = !overlay.enabled;
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}
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}
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